Studies for Absorption of Formaldehyde by Using Foliage on Wild Tomato Species

Abstract

Formaldehyde (HCHO) absorption capacity (indicating that HCHO was absorbed into foliage) was measured. Then, the metabolism-related substances (glutathione: GSH) and enzymes (glutathione-dependent formaldehyde dehydrogenase: FALDH and formate dehydrogenase: FDH) in the foliage of wild tomato species were investigated histochemically. In the measurement of HCHO absorption capacity, fresh foliage explant, which was placed in a sealed glass container, was treated with the adjusted 5 ppm HCHO from outside. As a result, in Lycopersicon (Solanum) pennellii LA0716, the HCHO concentration in the glass container significantly decreased down to 0.08 ppm, which is a guideline value indicating the safety of indoor air concentration established by the World Health Organization (WHO). On the other hand, the HCHO concentration of L. chilense TOMATO(WILD)94 did not decrease to the guideline value. Therefore, these results showed that LA0716 was an HCHO "high-absorbing" type in terms of capacity to remove HCHO, and TOMATO(WILD)94 was a "low-absorbing" type. An interspecific difference was observed among the wild tomatoes that were used in this study. In addition, changes in localization of HCHO metabolism-related substances and enzyme activity during treatment with HCHO was observed in the HCHO "high-absorbing" type, but was not shown in the HCHO "low-absorbing" type for each passage of time after HCHO treatment. In our study, we showed the possibility that fresh foliage explant in one wild tomato species, L. (S.) pennellii, absorbed and metabolized "toxic" HCHO.

New Insight into Short Time Exogenous Formaldehyde Application Mediated Changes in Chlorophytum comosum L. (Spider Plant) Cellular Metabolism

“…Although the formaldehyde removing plants have been intensively studied under varied environmental conditions, including different HCHO concentrations and times of exposure, indoor temperature, relative humidity, and illumination, the physiological and biochemical bases of HCHO phytoremediation and metabolism, as well as plant defense responses to this compound have not been fully elucidated [8,15,16]. Until now, it has been established that in plants, formaldehyde is mainly metabolized in the cells of leaf palisade and sponge tissues, in the mesophyll, and compounds and enzymes which are the first to bind and convert formaldehyde are localized mainly in the cytoplasm [17]. The main mechanism of formaldehyde loss in plants is its decomposition in plant tissue caused by enzyme and redox reaction [18].…”

Preparation of Mn-Fe Oxide by a Hydrolysis-Driven Redox Method and Its Application in Formaldehyde Oxidation

“…The methods of eliminating formaldehyde in indoor air are mainly plant purification, adsorption, plasma purification, photocatalysis, and catalytic oxidation . Catalytic oxidation is the most ideal method in eliminating formaldehyde compared to other physicochemical methods, which uses a catalyst to promote the reaction between formaldehyde and oxygen at low temperature to generate CO 2 and H 2 O .…”